Data senders need to decide whether data with bad checksum is transferred or not. While generally data with a bad checksum may be discarded, in disturbed environments even such data may be useful.

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Data senders need to decide whether data with bad checksum is transferred or not. While generally data with a bad checksum may be discarded, in disturbed environments even such data may be useful, in particular when parts of the message are common to multiple satellites, or when a portion of the data is already known.